Wednesday, September 30, 2009

Install a 32-bit driver on 64-bit Windows

Yesterday a found out that my super cheap Chinese PCMCIA-SERIAL adapter didn't come with a driver for x64 based systems. The adapter uses a CH352 chip and the manufacturer of the chip (www.wch.cn) doesn't even have any drivers on the website, let alone provide 64-bit versions.

Surprisingly, Microsoft had the answer this time.

http://www.microsoft.com/whdc/driver/install/64INF_reqs.mspx#E1G

You can install a driver not marked as 64-bit compatible if you create the following DWORD key in the registry and set the value to 1 (or anything but zero)

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Setup\DisableDecoratedModelsRequirement

I didn't even have to restart the computer and it worked like a charm.

Of course, you do this and any other modification of the registry at your own risk. It is only recommended for testing purposes.

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8 Comments:

Anonymous Anonymous said...

Hi,

I am running Vista 64-bit. I have bought a "2 serial, 1 parallel" PCI-card based on the CH353 chip. However, I cannot install the driver. (The driver that I use is "http://www.fecchio.com.br/downloads/WCH35x.zip")

I have tried your method. However, Vista still refuse to install the driver.

Any help?

Please kindly contact me via email takwing1hk@yahoo.com.hk.

Thx!!

October 29, 2009 at 5:22 AM  
Blogger Jaroslav Klíma said...

Hi,
1) what error message do you get?
2) it seems that there is another driver at the bottom of this page http://www.wch.cn/product/pci/ch353.asp
jk

October 29, 2009 at 7:35 AM  
Anonymous Anonymous said...

JK,

Thanks!! I have obtained the driver from the page that you have mentioned.
(To let you know, I am Chinese and so reading that page is not a problem for me).

It seems that the driver is more updated than the one I used. I will try it tomorrow (as the card is being used in the PC in my office).

Will let you know the results later.

Wing

October 29, 2009 at 5:27 PM  
Anonymous Anonymous said...

I can installed the driver successfully!

The only problem that I have now is that Microsoft Virutal PC cannot identify the parallel port. On my WinXP machine VPC settings, I can see that there is an option "LPT1 (xxxx-xxxx)" in the "Physical Parallel Port" dropdown. However, there is no option available in the VPC settings under Vista's VPC.

Any help from you?

October 30, 2009 at 4:37 AM  
Anonymous Anonymous said...

sound like my problem is a limitation of VPC 2007.

http://blogs.msdn.com/virtual_pc_guy/archive/2007/09/20/why-is-there-no-lpt-port-listed-under-virtual-pc.aspx

any workaround solution?

October 30, 2009 at 4:39 AM  
Anonymous Anonymous said...

Thanks so much for your posts ... took care of my problem!

Sorry I can't help with the virtual PC problem. Not using it.

November 8, 2009 at 4:46 AM  
Anonymous Anonymous said...

Hi there!
Need help!) The problem is that i can't install CH353 drivers on Win 7. It shows error like this one http://img85.imageshack.us/img85/9083/ch353.jpg

my email etosemki@gmail.com

December 19, 2009 at 11:39 PM  
Blogger Jaroslav Klíma said...

I have never seen that message, sorry...

December 19, 2009 at 11:48 PM  

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