I am sure a virus has affected my computer even though nothing shows up after full scan. Small regular blue squares arranged in columns appear after boot up, then all icons on desktop have a shadow of small black vertical lines about 4 mm long. Computer performance does not appear to have been compromised.1 person needs an answerI do too

Hi,· Since when are you facing this issue?· Do you remember making any changes to the system? I would suggest you to post a screen shot of the issue so that we can assist you in a better way. Method 1:I would suggest you to check whether the issue persists in safe mode. Follow the steps mentioned below.a. Restart computer and keep tapping F8 till you reach the boot menu.b. Select Safe mode from the boot menu and press Enter.c. Check whether the issue is persists. Method 2:I would suggest you to check in a new user account whether the issue persists. Follow the steps mentioned in the article given below to create a new user account.How to create and configure user accounts in Windows XPhttp://support.microsoft.com/kb/279783 Method 3:I would suggest you to run online virus scan.http://onecare.live.com/site/en-us/default.htm Thank you and Regards. Thahaseena MMicrosoft Answers Support Engineer.Visit ourMicrosoft Answers Feedback Forum and let us know what you think.