I use a backup UPS so that I can finish what I'm working on (mine lasts for about 45 minutes), save my data, and shut down normally. However, I don't think it has much impact on the overall life of my computer. While a 'normal' shutdown is best, any damage that may occur from an instantaneous loss of power would be so slight I doubt it would cause any noticable damage down the road. (Provided such isn't a common occurrance where you live.)
Now, a surge protector capable of handling your PC's load is very important, as the ~$50 product will sacrafice itself to save your $500+ computer. That translates to a very good investment. Just make sure that the one you get has ethernet and/or coaxal protection, as a power surge isn't limited to power cords. Also, make sure that everything connected to your computer physically is also protected by the surge protector, as once again, electricity isn't picky about how it fries your computer as long as it gets the job done.
Hope this helps,
I have been using my P4 - 2.4 GHz, 512MB Ram, and 80GB Hard Disk and a 24!Bit Sound Balaster with 5.1 Speaker Computer for quite 2 years from now. I have also recently added a wireless Router to My Existing Broadband Connection. Some times in my house all the Electrical Applicances ( except the Normal Lighting ) fuse off... do u think i should be investing on a UPS power Supply....Will it help make my computer's life longer than normal
Thanks in Advance ...