My computer takes forever to boot and is slow.

pls do following steps
1,Start>run>type "msconfig"
select startup
remove tick mark except your antivirus
apply
ok

This depends to some extent on what OS you're running, but the basics apply across the board. Run disk cleanup to clear out the temp files and empty the trash. Run disk defragmenter to improve disk access speeds. Uninstall unnecessary or no longer needed programs and use msconfig to disable unneeded startup processes (non-microsoft) that have been automatically installed with programs but don't need to run at boot. If you have a full service Internet Security suite running instead of a stand alone AV and firewall, look at AV comparatives or similar reports and evaluate your security software's use of system resources to see if it's a known hog. Consider switching to one that is well reputed but has a lighter footprint.
Having done all this, if your performance is still sub-par, you may need to upgrade the ram installed in the computer.
See articles that will guide you to performance improvement here, here, here, or here. Establish a maintenance routine that includes these steps to optimize your system's performance.
Finally, stay away from registry cleaners and software that purports to provide a miraculous speed improvement. They cause more problems than they solve, as you can see if you read here.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

this is a typical problem with this model DELL. The opening where the FANS funnel cooling air into the CPU of the computer get clogged with dust. inspect the back of the laptop and the bottom, buy a can of compress air at office depot or any other place and blow all the dust off. If the CPU does not receive enough air intake to cool off the perfomance decreases due to overheating.