David has worked with Microsoft products since MS-DOS 1.0. Over the decades, there have been high and low points, but they have remained the market leader for home and business. Because of their large user base, Microsoft products are also a huge target for malicious software. Keeping them virus free is often a challenge. David has extensive experience in virus cleanup and techniques to protect Microsoft systems. If you have a problem with Windows, give him a call and check out the Windows tips blog.