Computer runs slow,not enough gb,mouse frezzes,it reboots every time it stars,programs quit running, deleted everything,

Well, there are a number of possible reasons can cause your Lenovo computer running slow than it used to, it is hard to identify just what might be dragging down its performance, let alone implement the necessary technical adjustments to fix it. So if you want to address the issues more easily, I'll recommend you try a Lenovo speed up software, available here: http://www.speeduplenovo.com/

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It may well be some form of virus or spyware.

It may also be that you have too many applications running at once eg. lots of toolbars and instant message typ programs.

It can also happen on graphic intensive applications.

You should rule out nasty stuff first.

MBAM !

for a free one its pretty darned good !

From a CLEAN computer download and put on a flash drive.

Copy to your DESKTOP on the suspec computer.

Run it but dont change any options just use what it offers.

When its done let it clean anything it finds.

Its where I always start with an infected machine.

As for antivirus AVOID Norton or Mcafee but try the AVG FREE version MBAM should clean up without buying

Only continued use would require purchase As for too many applications that would be up to you to decide what you REALLY need and dont. Most toolbars are a waste of both time and space and can hog computers down. Maybe a good clean up is in order ?

It may just be a "leaking application"

These are badly coded programs that dont release memory when they should and just keep taking more to do the same job.

May I suggest you download "hijackthis"

It is a program that can make a report on what you have running in such a way that you can post that information to certain sites and experts there will look at it.

They will then give you reccomendations as to how you can remove programs or fix some issues that may be upsetting your computer.

Dont post the log here but follow the nstructions and help the program offers to send it to one of the sites it will offer you.

If you understand startup lists you may even be able to spot som things yourself that you dont want to run and disable them from hijack this.
.

You may have a virus, if you don't have any virus software then you will need to use a free one like Avast ( the one I use).
If you do have anti virus soft run a full scan of your computer.
Sometimes a virus will not let you use the internet if this is so you will need to do a repair install of your operating system.
Post a comment with your progress.