How can i replace a faulty hard drives in a virtual drive

Jim suggest trying to scan the disk first
it might fix problem or detect errors in your hard drive
https://www.mytoshiba.com.au/support/items/faq/596#Check_Disk
this would cost less
Then you could maybe know if hard drive is faulty or not and it might fix the problem
changing a hard drive is not too costly and the old information on it might be able to be cloned across if the hard drive is not too badly faulty.

check how much free space is on the hard drive and empty recylce bin.
Windows needs virtual memory from hard drive to run . if there is not enough space it could run out of virtual memory and freeze up.

Who told you that? No you cannot create a virtual hard drive with a storage capacity larger than that of the physical hard drive that contains it. And yes, you will lose any data stored on the hard drive if your physical drive is reformatted.

Hey, You got to free space on your hard drive. The virtual memory resides on your hard drive. but if the hard drive is getting full, this will reduce the virtual memory. So make home for virtual memory by free space on your hard drive.

You will probably have to replace the hard drive.Hard drive passwords are virtually impossible to remove even if you try it with another computer internally or externally

This error is related to the hard drive.
It could be a faulty connection on the hard drive - try re-seating the hard drive.
The hard drive may be faulty - go into the BIOS and see if the BIOS detects the hard drive.
If the BIOS cannot detect the hard drive then the hard drive may be faulty ot the laptop's hard disk controller could be faulty.
To determine if the hard drive is faulty, remove the hard drive and connect it into an USB hard drive adapter and plug this adapter into a working compute's USB port. If this computer cannot see this hard drive as an external hard drive then this hard drive is faulty and needs to be replaced.
When the new hard drive is installed in the Compaq laptop, insert your Windows installation CD and install Windows, plus the Compaq's device drivers and your programs to get a working laptop again.

yea it use space from real hard drive content file.vhd mean virtual hard drive which have ur virtual system

If you mean an USB pendrive/stick, these are much slower than hard drives.
There are so-called SSD - Solid State Disks, which have a special construction (many Flash banks running in parallel) enabling them to offer transfer speeds comparable to a hard disk. These come as ATA or SATA drives that you connect just as you would a traditional hard disk.

Your hard drive is getting to full for it to be used as virtual memory
When normal memory gets used up windows uses the hard drive as memory ans if insufficient room on hard drive is not available you get this message.
Solution.
1) delete programs from hard drive to create more space
2) Install new hard drive and transfer programs to it. creating more room on C drive
3) If hard drive is already partitioned and 2nd partition has a lot of free space transfer Virtual over to it.

Go to Start / Control panel Open The System folder go to "Advanced" "performance settings"
Then to "Advanced " Click on change and set Virtual memory to new disk.
Set maximum and minimum the same at 3 times the amount of normal memory you ave

You must have a virtual drive program installed, something like daemon tools or ulltra iso, What these programs do is allow you to open a cd/dvd image on your hard drive without burning it to a disc.

If you deactivate the virtual drive then you will just nedd to reactivate it if you want to mount an image to it.
All it is doing is creating a dummy drive and emulating a real cd drive on your system. Windows and the software you mount to these virtual drives can not tell the difference between virtual and physical drives

Partitioning software works with REAL Physical hard drives, not with virtual drives. Virtual drives are nonsense and should never be used to store data or images that one considers important. In this case, chances are your webcam selected some portion of your physical memory and called it a virtual hard drive, thus lessening both your computer's physical memory that could be used for other tasks and also making it impossible for you to retrieve your images or data from the virtual drive once the webcam was removed from its USB connection. Before removing the webcam from USB, you should have been advised to back-up your images to the REAL physical hard drive in whatever partitioning scheme you use on your hard drive, i.e. partition C:, D:, E:, etc.
Never but NEVER allow software to make important decisions for you, and Never use a virtual drive for transitory information that is easily corrupted but still considered important by you.
Your explanation was NOT to long, in fact it was the length of explanation that you gave that allowed me to fully address your issue