I am not sure what you mean by timers in your computer, so I'm going to assume you mean your clock is off by that much time. If your clock isn't synced right then it could cause issues with the timing for other things on your computer.
If you want to make your clock work right and have the right time all the time, you need to sync it. These tips will only work on Windows machines that are newer.
1. Go to your control panel from the start menu, click on Clock, Language, and Region, and then click on Date and Time.
2. Click the tab that says Internet Time and click Change settings with a shield icon next to it.
3. Check the box that says to synchronize with an Internet time server and click OK.
There is also a program called Atomic Clock Sync that says it can make your computer have the most accurate time possible.
If these things don't help, or if this isn't what you mean, let me know in a comment more about the problem and I can help you troubleshoot it some more.
1 - http://windows.microsoft.com/en-us/windows/set-clock#1TC=windows-7
2 - http://www.worldtimeserver.com/atomic-clock/