Windows 7: How to find out what Windows 7 Build I have?

System Manufacturer/Model Number Acer / PEW76(B)
OS Microsoft Windows 7 Home Premium 64-bit SP1
CPU AMD K10 (45nm Technology)
Motherboard Acer JE51_DN (Socket S1G4)
Memory 4.00 GB Dual-Channel DDR3 @ 536MHz (7-7-7-20)
Graphics Card ATI Mobility Radeon HD 4200 Series (Acer Incorporated [ALI])
Sound Card AMD High Definition Audio Device
Monitor(s) Displays Generic PnP Monitor on ATI Mobility Radeon HD 4200 Series
Screen Resolution Dual Monitor: 1366x768 / 1440 x 900

PSU 6-Cell Li-ion Battery
Hard Drives 298GB TOSHIBA MK3275GSX SATA Disk Device (SATA)

Computer type PC/Desktop
System Manufacturer/Model Number Custom Built by Me !
OS Windows 7 Ultimate 64-bit SP1
CPU Intel Core i5 3570k @ 4.0 GHz
Motherboard MSI Z77A-G45
Memory 16GB Corsair Vengeance @ 1600 MHz 10-10-10-27
Graphics Card MSI GTX660 Twin Frozr3 OC
Sound Card Realtek HD
Monitor(s) Displays Dell 19" HP 23" Sony Bravia 40"
Screen Resolution 1920 x 1080

Keyboard Fellowes KWD 855
Mouse Microsoft Wireless
PSU Corsair HX750 80+Gold
Case Corsair Vengeance Series C70 Gun Metal Black
Cooling Cooler Master Hyper N520, Arctic Alumina Thermal Compound
Hard Drives OCZ Vertex 4 119GB SSD WD Black 500, Blue 500, Caviar SE 320 x2
Internet Speed Download 25.81 Mbps Upload 5.07 Mbps
Antivirus MSE MBAM
Browser Chromium
Other Info Boston BA745 2.1 Speaker System, Lightscribe Dual Layer DVD Burner

OS Windows 7 SP1 Ultimate x86

Computer type PC/Desktop
System Manufacturer/Model Number Custom Built by Me !
OS Windows 7 Ultimate 64-bit SP1
CPU Intel Core i5 3570k @ 4.0 GHz
Motherboard MSI Z77A-G45
Memory 16GB Corsair Vengeance @ 1600 MHz 10-10-10-27
Graphics Card MSI GTX660 Twin Frozr3 OC
Sound Card Realtek HD
Monitor(s) Displays Dell 19" HP 23" Sony Bravia 40"
Screen Resolution 1920 x 1080

Keyboard Fellowes KWD 855
Mouse Microsoft Wireless
PSU Corsair HX750 80+Gold
Case Corsair Vengeance Series C70 Gun Metal Black
Cooling Cooler Master Hyper N520, Arctic Alumina Thermal Compound
Hard Drives OCZ Vertex 4 119GB SSD WD Black 500, Blue 500, Caviar SE 320 x2
Internet Speed Download 25.81 Mbps Upload 5.07 Mbps
Antivirus MSE MBAM
Browser Chromium
Other Info Boston BA745 2.1 Speaker System, Lightscribe Dual Layer DVD Burner

Computer type PC/Desktop
System Manufacturer/Model Number custom built
OS Win 7 Pro 64-bit 7601
CPU AMD Phenom 9650 QuadCore, revision DR-B3
Motherboard ASUS M4A78
Memory 4,00 GB
Graphics Card NVIDIA GeForce 9800 GT
Sound Card Realtek High Definition Audio
Monitor(s) Displays Fujitsu Siemens P19-3P
Screen Resolution 1280 x 1024 x 32 bits @ 60 Hz Oh yeah, 4:3 rocks!

Keyboard Microsoft, whatever.
Mouse Optical, logitec.
PSU whatever, around 450w
Case Scavenged from old company PC, 10+ years old
Cooling CPU fan, GPU fan, case fan, nothing fancy
Hard Drives (1) MAXTOR S TM3320613AS SATA Disk Device (2) STM35004 18AS SATA Disk Device (3) TOSHIBA USB 2.5"-HDD
Internet Speed effective max speeds: 70-ish kB/s down 30-ish kB/s up
Antivirus Avira, free endition.
Browser Firefox with FXChrome to make it look like Google Chrome
Other Info Was discarded by previous owner due to "horrible performance". Was running Win Xp from a IDE drive. Yeah. Was a pain. SATA II drive and Win7 and it zips away! Yay!

System Manufacturer/Model Number Acer / PEW76(B)
OS Microsoft Windows 7 Home Premium 64-bit SP1
CPU AMD K10 (45nm Technology)
Motherboard Acer JE51_DN (Socket S1G4)
Memory 4.00 GB Dual-Channel DDR3 @ 536MHz (7-7-7-20)
Graphics Card ATI Mobility Radeon HD 4200 Series (Acer Incorporated [ALI])
Sound Card AMD High Definition Audio Device
Monitor(s) Displays Generic PnP Monitor on ATI Mobility Radeon HD 4200 Series
Screen Resolution Dual Monitor: 1366x768 / 1440 x 900

PSU 6-Cell Li-ion Battery
Hard Drives 298GB TOSHIBA MK3275GSX SATA Disk Device (SATA)

Computer type Laptop
System Manufacturer/Model Number HP ENVY 17-1150eg
OS Windows 7 x64 Ultimate
CPU 1.6 GHz Intel Core i7-720QM Processor
Memory 6 GB
Graphics Card ATI Mobility Radeon HD 5850 Graphics
Sound Card Beats sound system with integrated subwoofer
Monitor(s) Displays 17" laptop display, 22" LCD and 32" Full HD TV through HDMI
Screen Resolution 1600*900, 1680*1050 and 1920*1080

Keyboard Logitech diNovo Media Desktop Laser (bluetooth)
Mouse Logitech MX1000 Laser (Bluetooth)
Hard Drives Internal: 2 x 500 GB SATA Hard Disk Drive 7200 rpm External: 2TB for backups, 3TB USB3 network drive for media
Internet Speed 50/10 Mbps VDSL
Antivirus MSE, Windows Defender
Browser Maxthon 3.5.2.
Other Info Windows 7 Ultimate Retail Full in English, additional Guest-user accounts in Finnish, German and Swedish (Working languages English & Swedish, Family language German, my own language, mother tongue, Finnish. I really need Ultimate to get to use Language Packs!)