I'm assuming too much for your PC. Are you using windows and if so
A lot of people would tell you to make sure you have the latest drivers for all your hardware in your PC. Make sure your windows is up to date.
Motherboard, sound card, video card etc...
Make sure your antivirus is up to date and check your system for the latest viruses. Download and check your system for spyware....usually
spyware doesn't affect hardware but....it can't hurt to check!
I don't know how old your CDRW is and I don't know your financial situation but locally here in the US your can get a decent CDRW
for about $20 (US) after rebates.
Hope this helps.