Windows 7 Professional OEM for $124, Ultimate $175, more offers the OEM Microsoft Windows 7 Ultimate 32-bit or 64-bit for $174.99 with free shipping -- also the lowest total price we could find. This version features BitLocker and support for up to 35 languages.

Meanwhile, Microsoft is running a promotion with select retailers that nets you a 50% discount on Windows 7 Home Premium Upgrade when you buy a PC with Windows 7 installed. For up to the second savings on Windows 7 and related products head over to our deals section, and if you find a bargain drop us a line in the comments.

Five more tech deals after the jump.

HP Pavilion Slimline s5280t Core 2 Quad 2.5GHz PC w/ Windows 7 for $475 + free shipping

HP Home & Home Office Store offers its newly-released HP Pavilion Slimline s5280t Intel Core 2 Quad 2.5GHz PC for $474.99 with free shipping via the directions below. It's $325 off and features an Intel Core 2 Quad Q8300 2.5GHz, 6GB of RAM, a 640GB HDD, dual layer DVD burner with LightScribe, Gigabit Ethernet, a media card reader, and Windows 7 Home Premium 64-bit. Deal ends October 31.

To get this deal: Click here to begin, choose the free 640GB 7200RPM HDD upgrade, click "Review & buy" to add it to your cart for $549.99, apply coupon code "MU23597" to drop the price to $474.99 with free shipping.

Dell Vostro 1520 Core 2 Duo 2.2GHz 15.4" laptop with Windows 7 for $499 + $12 shipping

Dell Small Business offers the Dell Vostro 1520 15.4" notebook in Obsidian Black for $549. Apply coupon code "J6HKMM1V7V0?94" to drop it to $499. Features include a 15.4" 1280x800 LED-backlit display, an Intel Core 2 Duo T6670 2.2GHz processor, 3GB of RAM, a 320GB 7200RPM HDD with Free Fall Sensor, dual layer DVD burner, 802.11g wireless, six-cell battery, and Windows 7 Professional. Coupon expires October 23.

15.6" Lenovo IdeaPad U550 w/ Windows 7 Home Premium for $579 + free shipping

Today only, Lenovo offers its 5.3lb Lenovo IdeaPad U550 15.6" notebook in Dark Brown for $679 with free shipping. Apply coupon code "USPU550DEAL" to drop it to $579 -- that's $120 off. This IdeaPad features an Intel Pentium Dual-Core SU4100 1.3GHz processor, 15.6" 1366x768 LCD, 3GB of DDR3 1066MHz RAM, a 250GB 5400RPM HDD, dual layer DVD burner, 802.11g wireless, Bluetooth 2.1+EDR, 1.3 megapixel webcam, fingerprint reader, six-cell battery, and Windows 7 Home Premium 64-bit. Of note, this PC ships in more than four weeks.

Samsung 24" 1080p LCD display w/ Logitech Mk300 Wireless Desktop for $199 + free shipping

At Dell Small Business, search for "A3138265" to find the Samsung 24" 1080p LCD monitor, bundled with the Logitech Mk300 Wireless Desktop for $198.99 with free shipping. That's $98 less than the best total price we could find for these items if purchased separately elsewhere. Deal ends October 29.

The monitor features a 1920x1080 native resolution, 5ms response time, 1,000:1 contrast ratio, as well as DVI and VGA inputs. The Logitech peripherals include a keyboard with 1-touch access controls and programmable F-keys, and a 1,200 dpi optical mouse.

Refurbished Sony Cyber-shot DSC-W220 12MP Digital Camera for $100 + free shipping

Sony Style offers the factory-refurbished Sony Cyber-shot DSC-W220 12.1 megapixel digital camera in blue for $149.99. Coupon code "SONYTWITTDEALS50DSCW220L" chops it to $99.99. With free shipping, that's $54 under the lowest total price we could find for a new unit and the lowest total price we've seen for this camera in any color by $35. Sales tax is added where applicable. It features a Carl Zeiss 4x optical zoom lens, 2.7" LCD, 15MB of internal memory, Memory Stick slot, face detection, smile detection, and more. A 90-day Sony warranty applies.