FIFTHTEXAS

hi have dell studio 17 backlit keyboard on post it beeps, know its the space bar. tried cleaning it, still the same. on e-mails and programs the cursor is erratic like the spacebar is being pressed constantly. also when in programs menues bars flash, like run through without me pressing any keys or mouse. so do i need a new keyboard? and if i do can i do it myself? laptop is now out of warranty. any ideas what it might be?

hi can not save now from my pc to my flash drive or external hd. keeps coming up saying write protected. tried everything, different flash drives all works fine on other computers. can anyone help. have tried to change registry storage device settings, wont let me. any ideas? tried downloading software stiil ot sorted it. dont know what to do. unless i completly format my whole computer. any suggestions? thanks