Hunt down the hardware
Should there be newly installed hardware, it may be causing difficulties by introducing bugs into your PC due to it being incompatible with your PC. Alternatively you might simply have installed it wrong. In any case, if it is affecting the computer, just Pcorrespond your hardware maintenance supplier and ask for a replacement or proper installation.

Software struggles
As with new hardware, recent programs can create difficulties also. Maybe the program is not compatable, or maybe it consumes an excessive amount of the hard drive, thus causing your PC to malfunction. You can either uninstall the software, in the former case, or increase your hard drive capacity for the bugs to stop plaguing you.

Net Nemesis
However, is spite of the problems with hardware and software, the biggest culprit for bugs is the Internet, your single largest source for PC bugs and viruses. Despite all the anti-virus software that you are armed with, bugs will still find their way into your PC through the Net in the form of spyware and malware. While one way of fighting these from clogging up your PC is to install anti-spyware and anti-malware programs, a better way, in my opinion, is to purchase a Windows Registry cleaner.