If this is truly a virus, I like Eset Nod32 because of it's scoring. I'm not sure if the online scanners will find a virus using rootkit technology, but Eset (and many others) have free online scanners.
Other free online anti-virus scanners:
Trend Micro
Norton Anti-virus
If you search for free online scanners and stick to the major name brands you will find a few. If you want, you can run two or three and if they don't find anything, either your in the clear or you have a deeper problem (rootkit).
There were some free rootkit detectors, one you may want to run is Microsoft RootkitRevealer.
Hopefully, the slowness is just a sign of slow hardware, or visual studio spinning up your app or running your app in debug mode. While that won't speed things up, but it's better than having a virus.
Good luck.
while generally the "duplicate" question is not meant to be an end-all-be-all virus question, this question is old and apparently abandoned. closing.
– quack quixote – 2010-05-28T18:01:01.500Can you clarify what you mean by "taking a long time"? Long time to do what? Which version of Visual Studio is this?
One common issue is if you are loading your website in Firefox, it will load the page extremely slow until you turn off ipv6 in about:config – None – 2009-12-31T04:19:05.413
Mr.Matt i6 is my browser and visual studio 2005. i write a simple code just displaying a message, it is taking so much time i thought it is virus problem. – None – 2009-12-31T04:22:10.717
Visual Studio is slow. It's most likely not due to a virus, or else you'd probably be experiencing other symptoms. – Sasha Chedygov – 2009-12-31T04:37:43.237
Show us your code and tell us how long it takes to run, in seconds. – Dour High Arch – 2009-12-31T05:56:43.747
"Best free antivirus for Windows" question: http://superuser.com/questions/2/free-antivirus-solutions-for-windows
– Gnoupi – 2009-12-31T08:33:36.503Though even if it was his wish to know for best antivirus, I doubt the cause of his debugging being slow was because of it. But I guess he will ask another question then. – Gnoupi – 2009-12-31T08:35:08.793