Can't log on XP-no mouse right click

XP Home version.
When I click my user name,it doesn't work,just an arrow,no hand.
The only way I can log on it to press ctrl-alt-del several times then a small pop up logon window appears and I can log on when I click it.
Once I'm logged on the mouse right click also doesn't work.
Everything else seems to work and I can get online.

I keep getting 2 Event ID 7000 errors.
Security services driver x86 failed to start due to the following error.
The system cannot find file specified.

The 5613 service failed to start due to the following error.
The system cannot find file specified.

How can I fix this?Keep in mind I'm no advanced computer user.

 

1. have you installed anything new just before the error occurred?
2. is your mouse in good shape?

https://social.technet.microsoft.co...3506.event-id-7000-service-start-failure.aspx

above can help find a few more details to the error using cmd prompt

 

Turned out to be a faulty optical wired mouse.
A day after posting the right click briefly worked a few times.
I thought it might be a corrupt file as past mouse failures rendered it inoperable.
Windows said-This device is working properly.

7000 error is still there but doesn't seem to affect anything.