If you didn't delete it when you installed Windows Live Mail, isn't it still on your system? If that's the case, you would just make Windows Mail your default mail service again.
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 ~
Computer type PC/Desktop System Manufacturer/Model Number Compaq sr5410f case OS Windows 7 Pro 64 SP1 CPU AMD X2 4450E @ 2.3 ghz Motherboard Biostar MCP6P M2+ Memory 4.0 g Graphics Card Nvidia GeForce 9600 GT , 512mb Sound Card onboard Monitor(s) Displays auria eq2367 Screen Resolution 1920 x 1080
Keyboard logitech wave cordless Mouse logitech LX8 cordless laser mouse PSU 250 watts Case Compaq Cooling couple fans Hard Drives 1 tb Hitachi HDT721010SLA scsi, 500 gb external Internet Speed comcast hi speed 19 dn 8 up Antivirus Microsoft Security Essentials Browser IE10 Other Info Laptop specs: HP g7-1365dx /
CPU: AMD A6-3420M APU with Radeon(tm) HD Graphics /
RAM: Crucial 8Gb (2x4Gb) /
SSD: Crucial M4-CT128M4SSD2 ATA Device/ FW 000F /
GFX: AMD Radeon HD 6520G /
OS: Microsoft Windows 7 Professional 64-bit 7601 Multiprocessor Free Service Pack 1
Computer type PC/Desktop System Manufacturer/Model Number Compaq sr5410f case OS Windows 7 Pro 64 SP1 CPU AMD X2 4450E @ 2.3 ghz Motherboard Biostar MCP6P M2+ Memory 4.0 g Graphics Card Nvidia GeForce 9600 GT , 512mb Sound Card onboard Monitor(s) Displays auria eq2367 Screen Resolution 1920 x 1080
Keyboard logitech wave cordless Mouse logitech LX8 cordless laser mouse PSU 250 watts Case Compaq Cooling couple fans Hard Drives 1 tb Hitachi HDT721010SLA scsi, 500 gb external Internet Speed comcast hi speed 19 dn 8 up Antivirus Microsoft Security Essentials Browser IE10 Other Info Laptop specs: HP g7-1365dx /
CPU: AMD A6-3420M APU with Radeon(tm) HD Graphics /
RAM: Crucial 8Gb (2x4Gb) /
SSD: Crucial M4-CT128M4SSD2 ATA Device/ FW 000F /
GFX: AMD Radeon HD 6520G /
OS: Microsoft Windows 7 Professional 64-bit 7601 Multiprocessor Free Service Pack 1