When I use VideoPad for at least 20 minutes, it causes my desktop to slow down. Everything (even shutting down the computer) becomes unbelievably slow. Here's my computer's specs:

Processor: Intel® Pentium® CPU G620 @ 2.60 GHZ

RAM: 2 GB (1.7 GB usable)

OS: Windows 7 Professional 32-Bit

Should I upgrade my desktop? Or should I replace VideoPad with another editor? Every time I check, Sony Vegas, Adobe After Effects and Adobe Premiere Pro are all too expensive and my desktop doesn't meet the minimum requirements.