Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: 32 bit vs 64 bit Comparison

27 May 2010   #31
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by zzz2496 View Post
Quote   Quote: Originally Posted by Lordbob75 View Post
Quote   Quote: Originally Posted by luckylukevn View Post
does 64bit OS mean it cannot be infected by virus because virus is 32 bit ?
Interesting question actually. Not something I ever thought about before.

In general, I would expect hackers to write universal code as much as possible.

~Lordbob
There is a "universal" code, that is by using intermediary runtime, like .net/java. But the downside of that road is the program will rely on that intermediary runtime, and the intermediary runtime MUST HAVE ACCESS to the core OS's functions to do it's harm.

An alternative would be to modify the kernel and segment the binaries, making one binary contains 2 completely different datastreams. This method was used by Apple's Mac OS X in the transition between PPC and x86, one binary package contains two datastreams, one for PPC, another for x86.

The last alternative, this will need you to modify the kernel and set the flag in the binary manually so that when it runs, it will invoke the processor's x86 legacy mode, and run it accordingly, but this has many downsides, too complex to explain...

zzz2496
Thanks for the explanation. I am not sure how they would do it, I just figured they would want it to work on as many systems as possible.

~Lordbob


My System SpecsSystem Spec
.
28 May 2010   #32
luckylukevn

Windows XP, Windows 7 Ultimate, Ubutun 10.04
 
 

Quote   Quote: Originally Posted by kucing13 View Post
Quote   Quote: Originally Posted by luckylukevn View Post
does 64bit OS mean it cannot be infected by virus because virus is 32 bit ?
I don't think so. And mind telling me how do you know certain virus 32 or 64. Just Asking . Thanks
it's shown in virus's name e.g Win32.Kido, Win32/Pacex. Win32/Conficker
My System SpecsSystem Spec
29 May 2010   #33
kucing13

 

Quote   Quote: Originally Posted by luckylukevn View Post
Quote   Quote: Originally Posted by kucing13 View Post
Quote   Quote: Originally Posted by luckylukevn View Post
does 64bit OS mean it cannot be infected by virus because virus is 32 bit ?
I don't think so. And mind telling me how do you know certain virus 32 or 64. Just Asking . Thanks
it's shown in virus's name e.g Win32.Kido, Win32/Pacex. Win32/Conficker
silly me,I never thought of that. Thanks mate
My System SpecsSystem Spec
.

29 May 2010   #34
luckylukevn

Windows XP, Windows 7 Ultimate, Ubutun 10.04
 
 

Quote   Quote: Originally Posted by kucing13 View Post

silly me,I never thought of that. Thanks mate
Don't be ashamed. We learn something new everyday. You're welcome.
My System SpecsSystem Spec
29 May 2010   #35
zzz2496

Windows7 Ultimate 64bit
 
 

Keep in mind, even if the description said Win32/xxx, it can still infect Win64 (the WoW subsystem). Unless you kill the WoW subsystem completely...

zzz2496
My System SpecsSystem Spec
29 May 2010   #36
pallesenw

Windows
 
 

"-A 64bit OS can address up too 8Tb of RAM (128 in 64 bit Vista, and 192Gb in Seven)."

That is a mix of virtual and physical address space limitations. 8 TB is the current user/kernel space limitation. 128/192 is the physical limitation.
My System SpecsSystem Spec
18 Jun 2010   #37
Hoods

Win 7 x64 HP
 
 

Thanks, Bob - that's EXACTLY what I wanted to know and clearly and well explained! Kudos ++

This week I accidentally bought a 32-bit copy (!@#@!#%@!) to upgrade from Vista x64 and was considering installing it (because having it is burning a hole on my desk!) but after reading your article I think I'll estrain myself and trade it back for the 64-bit, even though there are no big specials (here) on it at the moment!

Cheers
Hoods
My System SpecsSystem Spec
18 Jun 2010   #38
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by Hoods View Post
Thanks, Bob - that's EXACTLY what I wanted to know and clearly and well explained! Kudos ++

This week I accidentally bought a 32-bit copy (!@#@!#%@!) to upgrade from Vista x64 and was considering installing it (because having it is burning a hole on my desk!) but after reading your article I think I'll estrain myself and trade it back for the 64-bit, even though there are no big specials (here) on it at the moment!

Cheers
Hoods
Your welcome.

If you bought the 32bit, the key is the same, you just need a x64 bit disk.

~Lordbob
My System SpecsSystem Spec
18 Jun 2010   #39
Hoods

Win 7 x64 HP
 
 

Quote:
If you bought the 32bit, the key is the same, you just need a x64 bit disk.
Aaaaaaaaaargh - wish I'd known that a couple of hours ago when I bought 64 bit. LOL. No harm done, will give the 32-bit to my son.



Hoods
My System SpecsSystem Spec
18 Jun 2010   #40
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by Hoods View Post
Quote:
If you bought the 32bit, the key is the same, you just need a x64 bit disk.
Aaaaaaaaaargh - wish I'd known that a couple of hours ago when I bought 64 bit. LOL. No harm done, will give the 32-bit to my son.



Hoods
Well, that works

~Lordbob
My System SpecsSystem Spec
Reply

 32 bit vs 64 bit Comparison




Thread Tools




Similar help and support threads
Thread Forum
Ram comparison With and Without X.M.P!
Before Without X.M.P http://s30.postimg.org/798hcmc5d/cachemem.png After With X.M.P http://s30.postimg.org/lxjdnpcld/cachemem2.png not much of a difference but not bad considering it took 30 seconds to change in the bios, and its safe! :)
PC Custom Builds and Overclocking
Motherboard Comparison, what do you think?
For a gaming computer: MSI Z87-G45 Gaming Review Page 5 - MSI Z87-G45 Specifications & Features - Overclockers Club vs. ASRock Z87 Extreme4 Motherboard | Hardware Secrets vs. http://www.gigabyte.com/products/product-page.aspx?pid=4518#sp All very equally priced, which one would you...
Hardware & Devices
CPU Comparison
I'm looking for a site where i can compare cpu's side by side. i know that there is one for gpu's because i've use it and pointed others to it. just not sure if there is one for cpu's. thanks in advance for any help.
Hardware & Devices
SSD comparison
This link might be of interest to those of you considering purchase of a SSD. 12 best solid state drives | News | TechRadar UK
Hardware & Devices
CPU Comparison
I have my eyes on an Intel Core 2 Quad Q8400 Now I am wondering what kind of a boost to performance would I receive in gaming terms? My specs are below..
Hardware & Devices
Performance comparison
Ive run a couple of benchmarks comparing Windows XP 32-bit vs Windows 7 64-bit. Shouldn't I be getting better fps in windows 7 64 bit? Windows 7 64 bit CSS Stress Test 94.93 HL2 Lost Coast Stress Test 60.78 COH Great, avg 54.9 max 62.1 min 33.5 Windows 7 without sidebar CSS Stress Test...
Gaming


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 07:16.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App