My computer wont start up normally

ok, so my computer was freezing which it always does and it take forever to un freeze
so i hit the shut off button and ive done it ALOT. people tell me that its messes up the computer. so yesturday my computer was freezing but before that a windows thing pops up and says that something of VIRTUAL MEMORY TOO LOW or something like that, and so i click OK. and then BAM its starts freezing so im like ok..and i shut the button OFF and then when i turned it on a black screen apears and this is what it says..

"We apologize for the inconvenience, but Windows did not start successfully.
A recent hardware or software change might have cause this.

If your computer stopped responding, retarted unexpectedly, or was automatically shut down to protect your files and folders, choose (Last known Good Configuration to revert to the most recent settings that worked).

If a previous startup attempt was interrupted dude to a power failure or because the Power or Reset button was pressed, or if you arn't sure what cause the problem, choose Start Windows Normally.

Options:
Safe mode
Safe Mode with Networking
Safe mode with command Prompt

Last Known Good Configuration (your most recent settings that worked)

Start windows Normally

Use the up and down arrow to move the highlight to your choice."

PLEASE SOMEONE HELP!!! I DONT KNOW WHAT TO DO!! IVE CLICKED ON "SAFE MODE" and
"Last Known Good Configuration (your most recent settings that worked) and "Start windows Normally"!!!!!!!!! :(