Have you tried placing your cursor on the right-edge of the Taskbar and when the ⟺ arrow comes up, just dragging it horizontally to the edge of the screen?
System Manufacturer/Model Number HP Pavillion dv5t (generation 1) OS Vista 64 bit and 32 bit (SP2) CPU Intel(R) Core(TM)2 Duo Processor T9400 (2.53 GHz Memory 4GB DDR2 System Memory (2 Dimm) Graphics Card 512 MB NVIDIA GeForce 9600M GT Monitor(s) Displays 15.4" diagonal WSXGA+ High-Definition HP BrightView Widescre Screen Resolution 1680 x 1050
Keyboard Built-in HP Mouse Built in - Synaptics TouchPad V6.5 on PS/2 Port Hard Drives 320GB 5400RPM SATA Hard Drive with HP ProtectSmart Hard Drive Protection Internet Speed Max Other Info ~ Intel Next-Gen Wireless-N Mini-card w/Bluetooth ~ Blu-Ray ROM DVD+/-R/RW ~ Integ. HDTV Hybrid Tuner ~ 12 Cell Battery ~ MS Office (Home Premium) 2007 ~
I've never seen this. Have you changed windows theme or customized it in a way outside of windows (A downloaded theme perhaps)? Did a program change this?
Computer type PC/Desktop System Manufacturer/Model Number Dell Inspiron M5040 OS Windows 8 Pro with Media Center x64 CPU AMD E-450 APU 1.65 GHz Memory 4GB Graphics Card Built-in Radeon HD 6320 Graphics Screen Resolution 1366 x 768
Mouse Microsoft Wireless Mobile Mouse 3500 Cooling fan Hard Drives 500GB Internet Speed 2.86Mbps Download Speed, 2.85Mbps Upload Speed & 26ms Ping Antivirus Defender Browser IE10