URL mal

A message pops up about every 5 minutes and says that it has blocked malware
Process: svchost.exe
What do I do about this?
I only installed it yesterday.

start a new topic in the virus and worms section…
where you attach (not copy and paste) logs from Malwarebytes / OTL / aswMBR

see this guide http://forum.avast.com/index.php?topic=53253.0

you may also upload the “svchost.exe” file to http://virusscan.jotti.org/en and test with 20+ malware scanners
when you have the result, copy the URL in the address bar and post it here (in the new topic) for us to see