Hello and welcome to Bleepingcomputer.
I am providing a link to Microsoft's Microsoft Security Essentials forums support web page.http://social.answers.microsoft.com/Forums/en-US/msestart/thread/bf757e6a-e320-4a67-92bc-767e6acb26c4
This link has some useful information regarding installing MSE and the adverse effects of having other programs or scanners installed at the same time.
One care as it was is called is a discontinued product.
Quote from Microsoft below:
"Does MSE replace OneCare? Yes, and no. OneCare is now a discontinued product, and will not be supported after December 2010. Please see http://onecare.live.com/standard/en-us/default.htm
for more information. But, what did OneCare have that MSE does not? OneCare provided management of a “circle” of PCs. This management included backups, scans, and tune-ups of all PCs in the circle by the hub PC. This does not exist in MSE. With MSE, you must manage each PC individually, using the Windows tools. OneCare also included a firewall. MSE will use the Windows Firewall. OneCare and MSE both provide full anti-malware protection. MSE is free while OneCare required a paid subscription."
End of quote.
Your quote below naveen21:
"I recently had a malware attack on my lap after which I was unable to run both MSE and Windows Defender(WD)."
End of your quote.
You can NOT run both programs at the same time naveen21.
When MSE is installed, it automatically disables Windows Defender.
This is supposed to happen to avoid conflicts between the two programs, which do basically the same thing anyways.
In my personal opinion, MSE is a better program because you have better control over the program and can scan a suspect file by right clicking it and choosing scan with MSE.
Please make sure you do not have other scan tools activated that may interfere with MSE's staying active.
In other words, in the case of trying to clean a machine of an infection, we use various tools to remove the infection.
Once we are successful, we are left with various tools still installed on the computer which can
also cause conflicts with other tools or scanners.
When this happens, our computers defense is weakened not by a virus, but by programs competing with each other trying to keep your computer safe.
You may want to start off my un-installing all security programs you have installed, then start off using MSE.
Any other programs you install from that point on should only be programs that scan on-demand, but not
in real time.
MBAM is fine to have installed as the trial version, which does not monitor your computer 24/7. The trial is an on-demand program, which scans only when you start it up, update it and perform a scan of a file or your entire hard drive.
SpyBot S&D is another program, which scans on-demand.
Teatimer which is a part of SpyBot S&D monitors IE.
Please be sure that your other protection programs are not the reason MSE is experiencing issues with real time protection.
You can other programs installed, but is best to have only one program monitoring the system in real time
The other programs should only be set up to scan your system at your request.
Those programs can be MBAM, SpyBot S&D and Super Anti-Spyware removal freeware.
Links provided here.
MS Security essentials http://www.microsoft.com/SECURITY_ESSENTIALS/
Spybot search & destroy http://www.safer-networking.org/en/ownmirrors1/index.html
Norman Malware Cleaner http://www.norman.com/support/support_tools/58732/
Malwarebytes Anti malware http://www.malwarebytes.org/
Super Anti-Spyware http://www.superantispyware.com/?tag=SUPERANTISPYWARE
I hope you have found this information helpful and informative.
Kind regards to all of you who have read or posted to this thread.
Any questions or concerns? please ask.
Edited by MrBruce1959, 21 November 2010 - 02:19 PM.