Windows 8 is Microsoft's operating system that can be installed on PCs, laptops, tablets and home theatre PCs. The most common Windows 8 errors include installation errors, upgrade errors, DLL errors, and registry errors. These errors are often caused by human errors, missing drivers, virus attacks, or improper Windows 8 installation. Users facing Windows 8 issues can contact KBS IT Solutions for online technical support by calling their toll free number or emailing the company for assistance.