need help with a pop up warning

hi,

for a week now i get an avast pop up whenever i start the ie. the warning says that www.sitevacuum.info/BHODownload/VersionInfo.txt?MyVersion=15 has been blocked.
Can anyone help me and tell me why i get this msg and how i can get rid of this malware?

thx, barefoot

Try cleaning your temp files

TFC - Temp File Cleaner by OldTimer
http://www.geekstogo.com/forum/files/file/187-tfc-temp-file-cleaner-by-oldtimer/
TFC requires a reboot immediately after running. Be sure to save any unsaved work before running TFC.

Check your computer for malware with this

Malwarebytes Anti-Malware 1.50.1 http://filehippo.com/download_malwarebytes_anti_malware/
always update the program so you have lates database before you scan
click the remove selected button to quarantine any infections found

If annything is found, please post the scan log here

Thx a lot! Got everything fixed again.