Look after your computer as you would a car. Service regulary
Get these freebies which will help
CCleaner
www.ccleaner.com/ download it tidy up unused files, extensions etc (dont used advanced unless you know what you are deleting or back up at least)
Get avast! virus protection from here (free home edition)
www.avast.com/Get a firewall (if you need it) Zone alarm
www.download.com/3000-2092-10039884.htmlAdaware spyware cleaner/protection
www.lavasoftusa.com/products/ad_aware_free.phpAlso probably worth defragging your hard drive, you can do that with a variety of applications but the one on your accessorieds is probably good enough.
To change your clock......for me i double clicked my time in the bottom right hand corner changed clicked on time zone clicked the box that says automatically adjust clock for time zone required, clicked apply. All is well