Can't see folder / drive properties

Hello,
I have Window XP SP3 installed. It was working fine. I wass running AVG antivirus program so far, since problem with my folder properties, I added a-squared melware also to protect my computer and remove anything that might causing it. Folder properties window opens with all the tabs but whole tab content is covered with '+' and '-' signes and nothing is visible. Both signs are in white with + sign in Black backgrpund and - sign with Blue background in alternate spaceing. Properties are visible in safe mode, as they should.
I also had problem with changing the setting of visibility of Hidden files and Folders but was corrected by merging appropriate registery file. Thanks.
sql