These are the system files created by system in the folders.
Config.msi folder contains backup of apps that are installed but due to sloppy Windows installer it doesn’t remove the unpacked setup files, thus cluttering the config.msi with useless files.
Thumbs.db are usually full of preview thumbnails of thousands of images.
Iconcache.db is used to save the Windows Icons cache.
.sqm-files are created by Windows Live Messenger to read surfing behavior.
Desktop.ini is used to tell Windows how to display a certain folder, it is used to customize folders, change their icons, and so on.
These files are better left alone and not deleted. Because if you delete them they are created again. To hide these files from windows explorer, go to folder options in Control Panel and keep a check mark on Hide protected operating system files (Recommended).
My Computer
At a glance
MS Windows 7 Ultimate 64-bit SP1i5-2410M 2.3GHz (2.9GHz Turbo-Boost) Sandy Br...4GB+4GB Samsung DDR3 PC3-10700 (1333 MHz)Video Intel(R) HD Graphics Family, 1696MB ava...
Video Intel(R) HD Graphics Family, 1696MB available memory
Sound Card
Realtek High Definition Audio version=6.0.1.6323
Monitor(s) Displays
17.3 " Trubrite TFT LCD, LED Backlit
Screen Resolution
1600x900 32 bit, Native support for 720P content
Hard Drives
TOSHIBA MK6476GSXN
580.614 [GB] partitioned C: 80GB and D: 500GB with hidden recovery partitons.
Spare bay for 2nd HDD but no SATA connector :-(
PSU
Toshiba AC/DC Adapter
Case
Notebook
Cooling
Built-in Fan
Keyboard
Premium Raised Tile keyboard
Mouse
Logitech M215 wireless mouse
Internet Speed
Not fast enough
Other Info
Built-in Harman Kardon speakers with Dolby Advanced Audio, Waves MaxxAudio® 3. HDMI, 1xUSB3+3xUSB2 ports, WebCam, Battery life 4hrs 11mins, 4GB Readyboost SDHC card, WD My Book Essential Ext HDDs 2 TB, 2x1TB, My Passport SE 1TB and WDTV 1st Gen for Multimedia playing on a Sony Wega 32" LCD.
Recent addition to my toys are Asus Transformer Pad TF300T with 32GB onboard sd card + 32GB microsd card.