Computer problems, depressed

Users questions: Every time my computer systems are prompted to enter valid time. I have modified the BIOS information, replacing the BIOS battery is still the same, very depressed also. Hope you can help me ..
Experts answer: This may be in the virus, the virus automatically changes your system time, so that your antivirus software can not be anti-virus, Can not be upgraded. Some of time to install the software could not afford a. Under such a situation can reinstall the system, or if you have a system backup restore what killing virus on the line ...
  • This information provided by the users.Thanks!