how do you permanently delete files from your computer?

how to you get currently hidden folders to be accsesible?

While fine on a WXP machine, my WD USB drive is not recognised by
Windows ME. The blue light (USB power) shines, the gree arrow in the
system tray comes up (Disconnect Hardware icon) come up, and in the
Device Manager the USB Drive is fine as well. But in Explorer, no USB

My monitor is about 6 or 7 years old now. Its a Dell Trinitron.
It recently starting turning itself off, then immediately turns itself back
on.
Anybody got an idea of whats going on with it???

I do not know what is wrong with my cd/dvd rom drive on my computer,but
I just want to know if I am able to fix it.  I have a Hp XV976 (bought
direct from the store) and it has been running well for five years now.
But the cd/dvd rom drive is acting up. Sometimes it will work fine ...

Recently my emachine T2885 xp based system stoped working. While I dig up the
cash to repair it I have temporarily removed the hard drive and installed it
in my Me based pentium 3 Gateway as a slave. I did this to transfer my
important file to continue my work. All went will, but ...

I am having two different problems with two different monitors.
1- Philips 7CM5299/89T
A shiny line appears at the bottom (where the task bar is)  of the screen.
Sometimes a tap on the monitor clears it but it comes back after some time.