windows 7 45 gb wtf?

Run WinDirStat to get a better idea on what's eating the space. And it may be useful to post the left top quadrant of the WinDirStat output - not the quadrants with the colors top right and bottom.
 

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Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
OS
Vista, Windows7, Mint Mate, Zorin, Windows 8
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from 1.6GHz Duo to i7
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2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
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with trackball - no mices
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Trackball mice
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DSL 6000
Probably shadow copies and restore points.
 

My Computer

Computer Manufacturer/Model Number
Samsung NP530U4B-S02IN
OS
Windows® 8 Pro (64-bit)
CPU
Intel® Core™ i5 Processor 2467M (1.60GHz, 3MB L3 Cache)
Motherboard
Samsung Electronics
Memory
6GB DDR3 System Memory at 1,333MHz (on BD 4GB + 2GB x 1)
Graphics Card(s)
AMD Radeon™ HD7550M 1GB DDR3 (Ext. Graphic)
Sound Card
Realtek High Definition Audio
Monitor(s) Displays
35.56cm (14.0) SuperBright 300nit HD LED Display
Screen Resolution
1366x768
Hard Drives
1TB S-ATA II Hard Drive (5400RPM) with ExpressCache 16GB SSD
Internet Speed
sucks
Antivirus
Microsoft Security Essentials
Browser
Google Chrome (Sync enabled)

My Computer

Computer Manufacturer/Model Number
Toshiba Satellite S875D-S7239 laptop
OS
MS Windows 7 Ultimate SP1 64-bit
CPU
AMD A10-4600M
Motherboard
AMD Pumori (Socket FT1)
Memory
6.00 GB Dual-Channel DDR3 @ 798MHz (11-11-12-28)
Graphics Card(s)
AMD Radeon HD 7660G
Sound Card
High Definition Audio Device
Monitor(s) Displays
Generic PnP Monitor (1600x900@60Hz)
Screen Resolution
1600x900@60Hz
Hard Drives
SSD 119GB Corsair CSSD-V128GB2 ATA Device
Keyboard
Standard PS/2 Keyboard
Mouse
HP Wireless Optical Mobile Mouse Model FHA-3410
Internet Speed
What the local pub, local coffee shop offers.
Other Info
Optical Drive:MATSHITA BD-CMB UJ160B ATA Device


Also have an Asus ha1002xp netbook with Win 7 Ultimate installed.
Or use SpaceMonger to see your disk space distribution visually... in large scale..

zzz2496
 

My Computer

Computer Manufacturer/Model Number
Self Built
OS
Windows7 Ultimate 64bit
CPU
Intel Core 2 Quad Q6600
Motherboard
Abit IN9-32X-MMAX
Memory
DDR2 Adata 4GB
Graphics Card(s)
Nvidia GeForce GTX 285 1024 and Nvidia GeForce 8800GT 512
Sound Card
Asus Xonar HDAV 1.3
Monitor(s) Displays
Dell 2407WFP and BenQ 2400v and Philips 150v3
Screen Resolution
3840x1200 and 1024x768
Hard Drives
2 WDC 1TB
1 WDC 1.5TB
1 WDC 640GB
1 WDC 320GB
1 Seagate 200GB
PSU
Corsair TX 850W
Case
Cooler Master HAF932
Cooling
Arctic Cooling Freezer Extreme and plenty of fans...
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MicrosoftNaturalKeyboard 4000/Apple Alu keyboard/Dinovo mini
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Logitech G5/MarbleMouseTrackball/PerformanceMX/SpacePilotPRO
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1.5Mbps down/384Kbps up
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APC SURT 1000XL
Logitech Z-560
Wiimote
Mikrotik Router
Linksys (now Cisco) SD2008 8 port Gigabit switch
Linksys WRT54G (acting as AP)
Apple wireless Aluminium keyboard
Apple Magic Mouse
Xbox360 wired controller
You could get back some space by turning of hibernation .. the file hiberfil.sys will be the same size as your installed ram , so if you don't use it , it's wasted ..

Run this in a Command Prompt .. powercfg -h off .. to turn it off
powercfg -h on to turn it back on
 

My Computer

OS
Windows 7 64bit RTM
CPU
AMD Athlon 64 X2 3800+
Motherboard
ASUS M2N-E SLI
Memory
4G Dual channel
Graphics Card(s)
POV GeForce 7600 GT
Sound Card
USB 2.1
Monitor(s) Displays
Samsung 17 in LCD
Hard Drives
80G Western Digital
250G Western Digital
500G Buffalo Drivestation
Shadow copies and system restore points are stored in the "System Volume Information folder" located at the root of the drive. Similarly, hibernation file (hiberfil.sys) is located at the root of the drive. So all these will have no impact on the size of the Windows folder which the OP is concerned about.

Clean out your Temp files using CCleaner.

Delete the contents of "C:\WINDOWS\SoftwareDistribution\Download" folder.
 

My Computer

Computer Manufacturer/Model Number
Too many to describe...
OS
Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86
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