SUDDENLY YOUR DESKTOP ICONS ALL ARE CHANGE SAME PROGRAMS ICONS

your desktop icons are changed at once looking all programs are at same icons at that time we have so many solutions in that i can explain two ways :

1.THROUGH COMMAND PROMPT:

1.go to start menu.
2.run command
3.regedit in run command.
4.HKEY_CURRENT_USER\\software\microsoft\windows\currentvershion\explorer\flexts\
5.search for .lnk ext.
6.delete hole .lnk key or delete the user choice key on that.
7 just restart

2.BY USING SYSTEM RESTORE:

To restore system files and settings using a recommended restore point:1. Open System Restore by clicking the Start button. In the search box, type System Restore, and then, in the list of results, click System Restore. 
    If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
2. Click Recommended restore, and then click Next.
If there isn't a recommended restore point, follow the steps below to choose a specific restore point.
3. Review the restore point, and then click Finish.

To restore system files and settings using a specific restore point
1. Open System Restore by clicking the Start button. In the search box, type System Restore, and then, in the list of results, click System Restore. 

If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
2. Do one of the following:
•  If there is a recommended restore point, click Choose a different restore point, and then click Next.
•  If there isn't a recommended restore point, click Next.

3. Click the restore point that you want, and then click Next.
To view the programs and drivers that will be affected (which could include programs that will be deleted), click Scan for affected programs.
4. Review the restore point, and then click Finish

REPAIR YOUR USB/PENDRIVE

if your usb/pendrive not working properly its displayed an error message your device is not supported and formatted or its corrupted at that time we cannot do any thing at that we can do one thing to repair our pen/usb drive  follow the bellow steps to over come the problem:

1.First insert Memory Card/USB Hard Drive with your computer through your USB port and remove all other drives if you have connected.

2.Now open my computer and note down the drive letter of your USB or memory card.

3.Now click on start and then type cmd and then press enter or type cmd on search bar right click run as administrator.

4.Now type DISKPART in command prompt and popup might appears asking for permission,click ok

5.Now type list disk there and you will see all the disk will get listed there. 

6.Now there you will see your external drive, note down its disk number.

7.Now type select disk  disk_number  and press  enter.

8.Now type clean and press enter.

9.Now type create partition primary and then press enter.

10.Now type active and press enter.

11.Now enter the command select partition 1.

12.Now type  format fs=fat32 and press enter.

13.Thats it it will take some time and after that your drive will get successfully format and become ready to use 

14.if you want ntfs format repeat all step1 

to step 11


15.in the place of step12 place format fs=ntfs and

 press enter


16.now type assign  its done

                                                                        
TO SEE VIDEO ON YOUTUBE