Recently i got a BSNL 750 Unlimited internet connection with a Wifi router for providing wifi connectivity for laptops and cellphones in the house . Also i have a spare desktop PC (AMD Sempron 2.8 GHz, 1 GB DDR3, ECS motherboard, 450 watts PSU, 160 GB IDE + DVD/CDRW combo drive) which remains unused most of the time.
So i am planning to use this system as a 24/7 download PC.

but is it really advisable to run a PC for 24/7...I am mainly concerned abt the overheating of mobo and proccy and constantly moving mechanical parts like HDD
BTW is there any software that can monitor the system temperature
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Acer Aspire 4930G laptop- Core 2 Duo T5800 3GB ram, 320GB+LG XG1(2TB),nVIDIA 9300GS 256MB,FingerPrint Scanner,HDMI, 802.11a/b/g/Draft N Wifi
Sony Ericsson Xperia Arc S (Gloss Black)