Slow computer with a pop up that will open and close really quickly.

In the past week my computer has started to get slower and slower. Now it takes forever to do anything (using the internet or just writing a document). When I boot my computer, there is a window that will open and close so quickly that I don't have a chance to see what it says. Please help me.




Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD E-300 APU with Radeon(tm) HD Graphics, AMD64 Family 20 Model 2 Stepping 0
Processor Count: 2
RAM: 3686 Mb
Graphics Card: Mirage Driver, 3 Mb
Hard Drives: C: Total - 459847 MB, Free - 358098 MB; D: Total - 16989 MB, Free - 2122 MB;
Motherboard: PEGATRON CORPORATION, 2AD3
Antivirus: Microsoft Security Essentials, Updated and Enabled