Laptop Crashing and Printer not working following installation

[gold_finger]

My opinion of Linux Lite is not very favourable to say the least.

Sorry to here that.  Whether or not you end up staying with LL, you've got my curiosity going.  Would like to try getting to the bottom of your problem if you don't mind continuing on with posts.

As Valtam asked, is the computer itself crashing (suddenly powering off) or are certain programs just locking up?  Sounds like a web browser problem from what you've stated so far.
*  What browser are you using -- Firefox, Chrome, etc.?
*  Does it only happen when on sites that have a lot of flash content?
*  List any browser addons that you may have installed.
*  Do any other programs cause "crashing" or lock-up problems?
    * If yes, is the web browser running at the same time?  What happens if no web browser being used?
*  Do you experience any problems when first booting up into LL?  If so, please describe.
*  Printer probably won't be a problem once you've got the right driver installed - so not going to get into that for right now.

If problem is "lock-ups" as opposed to the computer actually crashing and turning off, then you should be able to kill the specific program that is locked up without having to hard shutdown the computer.

Try opening a terminal through the Menu, or by hitting CTRL+ALT+DEL.
* Assuming you want to kill the frozen Firefox browser, enter the following command in terminal:

Code:

killall firefox

* Substitute correct name of program you need to kill in place of firefox if example doesn't apply.

* Run command a second time if doesn't work initially.

*  If still doesn't kill firefox, run it again but begin command with "sudo" and enter your password when asked:

Code:

sudo killall firefox

Doing the above should get rid of the locked up application without you having to hard shutdown the computer (which can create other problems).

Will wait to hear your feedback before guessing at anything.