PC requirements

Nancy Drew: The Haunting of Castle Malloy System Requirements

Nancy Drew: The Haunting of Castle Malloy needs at least 1 GHz or greater Pentium or equivalent class CPU, 128 MB of RAM and 32 MB DirectX 9.0 compatible video card graphics.

Verified Sources: Steam store listing
Nancy Drew: The Haunting of Castle Malloy minimum and recommended PC specifications
Component Minimum
Operating system Window XP/Vista
Processor 1 GHz or greater Pentium or equivalent class CPU
Memory 128 MB of RAM
Graphics 32 MB DirectX 9.0 compatible video card
DirectX 9.0
Storage 1 GB or more of hard drive space
Not sure how your PC compares? Use the Can I Run It checker — pick your CPU and GPU and it tells you which column you land in.

Other platforms

Nancy Drew: The Haunting of Castle Malloy is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Nancy Drew: The Haunting of Castle Malloy on PC

Can my PC run Nancy Drew: The Haunting of Castle Malloy?
Compare your CPU, GPU and RAM against the minimum column below. If your parts match or beat every minimum row, the game will launch — though you may need to lower settings. Matching the recommended column is what gets you 60fps at 1080p.
How much storage does Nancy Drew: The Haunting of Castle Malloy need?
1 GB or more of hard drive space