Hello and welcome to the forum.
Since your post does not really describe what you may be able to do with your system, try this.....
Use
Ctrl + Alt + Delete
To launch Task Manger
From the file menu select "Run New Task"
In the box type
Control Panel
HIt enter or click OK
From Control Panel\All Control Panel Items\System
Left Column choose "System Protection"
Click the "System Restore" button
Click "Next".
Check the box that says "Show more restore points"
Pick a point in time prior to the problem first presenting.