What operating system?
What was the previous security software? Was it uninstalled? Did yo use a cleanup tool from the vendor?
The following may help:
You might receive a message in the Microsoft Security Essentials Windows notifying you that
“ Microsoft Security Essentials isn't monitoring your computer because the program's service stopped. You should restart it now.
”
Step 1: Restart your computer.
Step 2: Make sure the “ Microsoft Security Essentials
” service is set to automatic and started
- In Windows XP, click Start
, click Run , type
services.msc , and then press
ENTER .
–or–
In Windows Vista and Windows 7, click Start
, click in the Start Search
box, type services.msc , and then press
ENTER . - Search for Microsoft Antimalware Service
. Right click it and select Properties
or double-click it to open the service.
- Check to make sure that the " Startup Type
" is set to " Automatic
".
- Click the Start button to start the service. If the
Start button is not available, click the
Stop button, and then click the
Start button to restart the service.
- Make sure you note any errors that may appear during this process, submit a case online, and include the error information.
Step 3: Remove any existing Internet security programs
- In Windows XP, click Start
, click Run , type
appwiz.cpl , and then press ENTER
.
–or–
In Windows Vista or Windows 7, click Start
, click in the Start Search
box, type appwiz.cpl , and then press
ENTER . - In the list of installed programs, uninstall any third-party Internet security programs.*
- Restart your computer, and then try to install Microsoft Security Essentials again.
|
Note:
|
|
*Some Internet security applications do not uninstall completely. You may need to download and run a cleanup utility for your previous security application in order for it to be completely removed.
|
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Caution:
|
|
When you remove Internet security programs, your computer is unprotected. If you have problems installing Microsoft Security Essentials after you remove existing Internet security programs, contact Microsoft Security Essentials Support immediately
by submitting a case online (see How to submit a case online
for details).
|
Step 4: Uninstall/re-install Microsoft Security Essentials
- In Windows XP, click Start
, click Run , type
appwiz.cpl , and then press ENTER.
-or-
In Windows Vista and Windows 7, click Start
, and in the Start Search
box, type appwiz.cpl , and then press ENTER.
- In the list of installed programs, click Microsoft Security Essentials
, and then uninstall it.
- If prompted, restart your computer, and then try to install Microsoft Security Essentials again.
If the above steps do not solve your problem, you can always reinstall Microsoft Security Essentials and contact
Microsoft Security Essentials email support .
-steve
~ Microsoft MVP Windows Live ~ Windows Live OneCare| Live Mesh|MS Security Essentials Forums Moderator ~