Windows fails to start up intermittently. System restore fixes the problem
for a period, usually a day or two, and then it happens again. When I restore
all of the updates eg. Windows upgrades, anti-virus upgrades etc. it still
works fine and I cannot reproduce the error. Last time it failed I started up
using Msconfig to disable services, then I turned them all back on and it
worked fine - again! Everything I try works, but then fails some time later.