Quick answer: Send one email to service@getdigimarket.com containing: your order number; the product name from the order; the edition and version shown on your machine (Settings, System, About for Windows, File, Account for Office, winver for Server); a screenshot of the error with the code visible; and one line describing what you did. Add the output of slmgr /dlv (Windows) or cscript ospp.vbs /dstatus (Office) if you can. That is everything needed for a fix, a confirmation ID or a replacement in the first reply.
When a key is refused, the fastest route to a working installation is a first message that answers the questions support would otherwise have to ask. This guide lists those questions, explains where each answer comes from, provides a template to paste into your email, and shows the extra command output that turns a two-day thread into a one-reply fix. It applies to every product we sell, from Windows 11 Pro to Office 2024 Professional Plus and Windows Server.
The five essentials
1. Order number
It is in the subject and first lines of your delivery email and on the Orders page in My Account. It identifies the key, the product and the licence type instantly. If you cannot find it, give the email address used at checkout and the approximate date.
2. Product purchased
Copy the product name as it appears on the order, including the device count, for example “Microsoft Office 2021 Professional Plus Product Key, 1 PC”. This lets us check for a mismatch against what is installed.
3. What is installed
- Windows: Settings, System, About, the line under “Windows specifications” (for example “Windows 11 Pro, version 25H2”).
- Office: open Word, File, Account, the product name under Product Information (for example “Microsoft 365” or “Office Professional Plus 2024”).
- Windows Server: press Windows + R, type
winver; note the edition and whether it says Evaluation. - Mac: Word, About Word, the licence line.
Also say whether this product has been installed on this machine before, and whether the PC came with Windows or Office preinstalled.
4. The error, as a screenshot
Capture the error window with the code visible (Windows + Shift + S on Windows; Shift + Command + 4 on a Mac). Codes look like 0xC004F050 or 0xC004C008 and are usually in small text at the bottom of the dialog or on the Activation page. Our guide on sending error screenshots shows which screens to capture for each product. A photo of the screen from a phone is fine if the text is readable.
5. What you did
One or two sentences: “Clean install from the Microsoft ISO, entered the key in Settings after setup, got the error above.” Or: “Installed Office from the link in the email, entered the key under File, Account, Office says the key has already been used.” This tells us which step failed and whether the official download was used.
The extras that save a round trip
Windows licence status. Open Command Prompt as administrator and run slmgr /dlv. A dialog shows the licence status, the activation channel (RETAIL, OEM_DM, VOLUME_KMSCLIENT), the last five characters of the installed key and the remaining rearm count. Screenshot the dialog. It tells us in one glance whether an old OEM key or a volume key is in the way.
Office licence status. Open Command Prompt as administrator, run cd "C:Program FilesMicrosoft OfficeOffice16" then cscript ospp.vbs /dstatus. Copy the output or screenshot the window. It lists every licence installed with its status and last five characters, which reveals leftover trials and mismatched editions immediately.
Installation ID for telephone activation. If the error is a 0xC004C code (activation count or blocked), run slui 4 on Windows, or cscript ospp.vbs /dinstid for Office, and include the installation ID. We can return a confirmation ID in the same reply through our free Confirmation ID service without a further exchange.
A template you can paste
Subject: Activation problem, order #[your order number]
Order number: #[number]
Product bought: [name from order]
Installed: [edition and version from Settings or File, Account]
Installed before on this PC: [yes/no]; came preinstalled: [yes/no]
Error: [code and message]; screenshot attached
What I did: [one or two sentences]
slmgr /dlv or ospp.vbs /dstatus: [attached or pasted]
Installation ID (if asked for phone activation): [nine groups]
Preferred outcome if the key cannot be activated: [replacement/refund]
Send it from the email address used at checkout, or say which address you ordered with.
What not to send
The product key itself is not needed; we can see it from the order. Do not send card details or passwords, which we never ask for. Do not send videos of the screen; a still screenshot with the code is clearer and smaller. And do not run third-party “activators” before writing to us; they change the licence state and make the diagnosis harder.
What happens next
Support replies every day in order of arrival, usually within hours when the message is complete. The reply contains the diagnosis, the fix steps or a confirmation ID, or a replacement key. If a replacement also fails, the order is refunded under the 180-day money-back guarantee. If you have not seen a reply after one business day, check spam and read our note on why a reply may not have arrived.
Solving it yourself in the meantime
Most refused keys have one of three causes, all fixable in minutes: the installed edition does not match the key, an older key or trial is still attached, or online activation refused the request and telephone activation is needed. Our guides to keys reported as used or blocked, “This product key didn’t work” and edition mismatches walk through each. If you solve it, there is no need to write at all; if not, you will have gathered exactly the details above.
Product-specific details worth adding
Windows Server. Include the output of DISM /Online /Get-CurrentEdition and whether the server is a domain controller. Evaluation editions need a DISM conversion before activation, and domain controllers cannot be converted, so these two facts decide the answer; our Server evaluation guide explains both.
Office for Mac. Include the Microsoft account address you redeemed the key to (not the password) and the message shown on the redemption page. Mac activation is account-based, so most Mac cases are about the account rather than the key. See the Office for Mac guide.
Visio, Project and standalone apps. Say which Office suite and version is already installed, because the 2024 standalone apps cannot be installed alongside Office 2016 or 2019; the error often appears during installation rather than activation. Our standalone apps guide lists the compatible combinations.
Multi-PC licences. Say how many machines have used the key so far and whether any have been reinstalled. A 5-PC key refused on the third machine usually means a reinstall consumed an extra activation, which telephone activation resolves.
Why these details make such a difference
Activation errors are specific, but the on-screen messages are generic. The same “didn’t work” dialog covers a typo, an edition mismatch, a leftover trial, a volume-channel installation and a server-side refusal, each with a different fix. The five essentials above distinguish between them without a question from us, which is the entire difference between a reply that says “please send a screenshot” and a reply that says “here is the fix”. Every minute spent gathering them is repaid several times over.
How to copy command output cleanly
In Command Prompt or Terminal, right-click the title bar, choose Edit, Select All, then press Enter to copy; paste into the email with Ctrl + V. Alternatively, send the output to a file with cscript ospp.vbs /dstatus > %USERPROFILE%Desktopoffice-status.txt and attach the file from your desktop. For slmgr /dlv, which opens a dialog rather than printing to the window, use cscript slmgr.vbs /dlv instead to print it as text, or simply screenshot the dialog. Either form is readable; text is easier for us to search, screenshots are easier for you to produce.
If you cannot get into Windows at all
Sometimes the activation question arrives alongside a bigger problem, such as a PC that will not boot after a failed upgrade. In that case say so first; activation can wait, and we will point you to the repair options on the installation USB (our bootable USB guide explains the Repair your computer menu). Activation after a repair or reinstall on the same hardware usually completes automatically from the digital licence, and if it does not, the checklist above applies as normal.
A shorter version for simple cases
If the problem is clearly a delivery question rather than an activation failure (the email has not arrived, or you need it re-sent to another address), the order number and the checkout email address are enough; no screenshot is needed. If the problem is a payment decline, the time of the attempt and the message shown are enough. The full checklist above is for activation errors, where the details genuinely change the answer.
Frequently asked questions
Do I need to include my product key in the message?
No. We can see the key issued to your order from the order number. The error your machine shows when the key is entered is what matters.
Where do I find the error code?
On the Windows Activation page below the explanation text, or at the bottom of the activation dialog in Office. It begins with 0x followed by eight characters. Include the whole code.
Is slmgr /dlv safe to share?
Yes. It shows only the last five characters of the key and licence status information. It cannot be used to activate another machine.
Can I send a photo from my phone instead of a screenshot?
Yes, as long as the error code and window title are readable. Turn the flash off and hold the phone parallel to the screen.
What if I don’t know my order number?
Give the email address used at checkout, the product and the approximate date. We find the order from those.
How fast is the reply with a complete message?
Usually within hours, and at most one business day. Most complete messages are resolved in the first reply.