That is quite normal in some situations. Now, sometimes you can just invoke the admin privledge and complete the task and sometimes it is not that simple. Gives us some specific examples if you require further clarification. Good luck.
You would need to take ownership of the "WindowsApps" folder, then set it's permissions to "Allow" your account or administrators group "Full Control" first. Afterwards, you should be able to open/access it.
Asus M2N-MX SE Plus § DualCore AMD Athlon 64 X2, 2300 MHz (11.5 x 200) 4400+ § Corsair Value Select
CPU
AMD 4400+/4200+
Motherboard
Asus M2N-MX SE Plus/Asus A8M2N-LA (NodusM)
Memory
2 GB/3GB
Graphics Card(s)
GeForce 8400 GS/GeForce 210
Sound Card
nVIDIA GT218 - High Definition Audio Controller
Monitor(s) Displays
Hitachi 40" LCD HDTV
Screen Resolution
"1842 x 1036"
Hard Drives
WDC WD50 00AAKS-007AA SCSI Disk Device
ST1000DL 002-9TT153 SCSI Disk Device
WDC WD3200AAJB-00J3A0 ATA Device
WDC WD32 WD-WCAPZ2942630 USB Device
WD My Book 1140 USB Device
PSU
Works 550w
Case
MSI "M-Box"
Cooling
Water Cooled
Keyboard
Dell Keyboard
Mouse
Microsoft Intellimouse
Internet Speed
Cable Medium Speed
Browser
Chrome/IE 10
Antivirus
Eset NOD32 6.x/Win Defend
Other Info
Recently lost my Windows 8 on my main PC, had to go back to Windows 7.