you dont have AVG and avast installed at the same time ? only install one AV

and SpyBot is not any good with todays malware

check for malware with

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

you may post the scan log here if anything is found