If you're having trouble accessing files on your hard disk, check the permissions first. You might need to give yourself permission to access them. To do so, open up Windows Explorer (Windows 7) or Finder (Mac OS X). Then right click on the file or folder you wish to access and select Properties. Click on the Security tab and then tick the box next to "Allow executing file as program". This will allow you to run programs on the file or folder. In addition to giving you the ability to execute programs on files, this setting also allows you to change the permissions on folders and drives. For example, if you want to be able to delete a file from a drive, you'll need to give yourself permission. If you're having trouble deleting a file, check the permissions settings on the folder where the file resides. You might find that you need to change the permissions to allow you to delete the file. To do this, right click on the folder and select Properties. Click on the Security tab and then click Edit. Now, you'll see a box at the bottom of the window labeled "Permissions." Change the permissions to whatever you'd like. The easiest way to fix this problem is to simply restart your computer. However, if you want to avoid this hassle, you can use Windows Explorer to reset the permissions. Right click on the folder and choose Properties. Click on the security tab and then click on Advanced. In the advanced section, click on Reset button. Now, you'll be asked to confirm whether you really want to reset the permissions. Click Yes. If you're having trouble accessing files on your PC, check disk permissions first. You can easily fix this problem by right clicking on the file/folder and choosing properties. Click on the Security tab and then click on the Advanced button. In the advanced section of the window, click on the Reset button. Now, click on the OK button. You'll now be prompted to confirm whether you really wanted to reset the permissions. Simply click yes. Once you've done that, you should see the permissions change from Read Only to Full Control. That's all there is to it. If you're having trouble accessing files on your computer, check disk permissions first. You'll be surprised at what you find.