I bought my Dell desktop last year and everything has been working great until recently when I started getting "blue screen errors" It happened 3 times in last 10 days actually it happened just few minutes ago. Computer restarts itself and blue screen error pops up. I ran the "dell system checkup software " and it found 507 problems.  I will clean any dust from the computer if necessary. Is there a software that you would recommend to scan the computer? Will re-installing Windows fix the problem? I would like to avoid doing it unless its really a must. Any help will be appreciated Thank You