Cannot restore my computer to a restore point?

[1ARMEDBANDIT]

I cannot restore my computer to a restore point?... I tried to edit a photograph through a photo editing suite which I always use and it said unable to open image? I then tried to restore the system but It says unable to.
Also when I check my system status and general information it says error? Also when I check my Dell system support "Check Now" icon it says error. Its showing error on the advanced general status of the system. Error Error Error.

I have tried to restore it to various points over the past 3 months but it says unable to each time. I rang Dell computers, they can only help by a complete system restore which will cause me to lose all me files, and there`s a hefty charge.

Anyone know what could be the cause of this? and a possible fix?
I can still use the internet so is the problem anything to worry about?

[ianmunt]

Try booting up into safe mode then restoring?

[rojash]

The problem is almost certainly due to your machine being very low on question marks. Try using them only at the ends of questions (you can use a full stop for other sentences). After a few days, the machine will have built up a stock which should be sufficient for normal use (unless you're a quizmaster).

[another-view]

ouch!